Flash firmware on iTracker 8211 with arduino fails

[tobias]

Hi all, I have problems burning/flashing the iTracker8211.

Setup:

• OS: Linux/Ubuntu
• Segger J-Link JTag Debugger
• Arduino environment
• iTracker 8211 NBS

Issue:

I try tu burn/flash the iTracker 8211 NBS. I followed the documentation (for arduino)

iTracker%20Arduino%20Development%20environment.pdf

After “Verify and upload led_switch example” the iTracker isn’t detected any more as Bluetooth device and my upload-output says “Error: nRf52.cpu – clearing lockup after double fault”.

I also wondered why I do not have the “nRF5 Flash SoftDevice” option in arduino (which is shown in 4.3 Set the board and burn softdevice).

Details:

This is my complete debuging output:

This is my Pin connection:

GND -> pin 6
SWDCLK -> pin 9
SWDIO -> pin 7
(regarding https://www.segger.com/products/debug-probes/j-link/technology/interface-description/)

Do you have any idea, what could be the problem ?
best regards, and many thanks in advance,

tobias

[tobias]

P.S. this is my Debugger:

[Nicholas]

After “Verify and upload led_switch example” the iTracker isn’t detected any more as Bluetooth device and my upload-output says “Error: nRf52.cpu – clearing lockup after double fault”

You have to power 8211 through batteries.

I also wondered why I do not have the “nRF5 Flash SoftDevice” option in arduino (which is shown in 4.3 Set the board and burn softdevice).
You have to go through this step.

[tobias]

Hi Nicholas, thanks for your reply.

You have to power 8211 through batteries.

yes I put the board to batteries. And before I tried to flash it I could also see the iTracker as bluetooth device (through the nRF Connect App). After triyng to flash (regarding the documentation) not anymore.

You have to go through this step.

Yes, I followed exactly this documentation. The only differnece is, that I do not have this option nRF5 Flash SoftDevice which is discribed in “4.3 Set the board and burn softdevice”.

You have any other ideas about this issue ?

[Nicholas]

Does it look like the writing has been successful?

[tobias]

   Arduino: 1.8.9 (Linux), Board: "iTracker, S132"

Sketch uses 26080 bytes (4%) of program storage space. Maximum is 524288 bytes.
Open On-Chip Debugger 0.10.0-dev-00254-g696fc0a (2016-04-09-12:07)
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
debug_level: 0
swd
adapter speed: 10000 kHz
cortex_m reset_config sysresetreq
Error: nrf52.cpu -- clearing lockup after double fault
Polling target nrf52.cpu failed, trying to reexamine
nrf52.cpu: target state: halted
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0xfffffffe msp: 0xfffffffc
** Programming Started **
auto erase enabled
wrote 28672 bytes from file /tmp/arduino_build_530984/led_switch.ino.hex in 0.620467s (45.127 KiB/s)
** Programming Finished **
** Verify Started **
verified 26280 bytes in 0.086617s (296.294 KiB/s)
** Verified OK **
** Resetting Target **
shutdown command invoked

I think it wrote something to the board (because before triying to flash, I detected the iTracker as Bluetooth-dev and after not anymore). As shown in the sketch-upload-log above it has this error “nrf52.cpu – clearing lockup after double fault”, but als writes something to it “wrote 28672 bytes from file /tmp/arduino_build_530984/led_switch.ino.hex”.

[tobias]

I found now the reason why I couldn t flash the firmware correctly. I needed to:

1. setup nRF5FlashSoftDevice regarding https://github.com/sandeepmistry/arduino-nRF5#flashing-a-softdevice
2. download and copy softdevice regarding https://github.com/sandeepmistry/arduino-nRF5/issues/363

maybe it would be good idea to include this to the documentation of the iTracker development setup.

But one thing still does not work:
I do not receive any data / serial-output on my serial monitor. I connect the JLINK V9 Emulator Kit Simulator and the upload does work now. I also can see and connect to the Bluetooth-Device (through the nRFConnect App). I connect my Serial Monitor to the given baud-rate but do not receive any data.

@Nicholas do you have any idea regarding this problem ?

[Nicholas]

You can try it by phone APP!